Yii2 Sluggable Behavior空西里尔文值

Question

Yii2 SluggableBehavior提交GII生成的表格后为空西里尔文值。拉丁字母没关系。是什么原因呢？

public function behaviors()
    {
        return [
            TimestampBehavior::className(),
            'slug' => [
                'class' => SluggableBehavior::className(),
                'attribute' => 'name'
            ]
        ];
    }

~ php -m | grep intl
intl

.zprofile：

export PATH=/usr/local/php5/bin:$PATH

PHP版本：7.3.3 服务器：Nginx 1.15.10